Question

Why is spore formation in bacteria not considered a form of reproduction?

Answer 1

Bacteria reproduce asexually by binary fission method. Spore formation is just a method to avoid unfavorable conditions.

Complete answer: The spore of bacteria is formed in response to adverse conditions and constitutes a durable form with minimal metabolism which can usually survive starvation as it is formed from the original cell and no new cell is formed it is not considered reproduction.
Spores in bacteria constitute a durable form with minimal metabolism, which can usually survive starvation, drought, etc.
Spores are formed from the original bacterial cell, and no new cell is formed.
So, it is not considered as a reproduction mechanism but in eukaryotic sporulation, a durable form of haploid cells is produced upon meiosis.

Note: Spores of the bacteria are the most dormant structure and it helps to exhibit minimal metabolism, respiration, and reduced enzyme production. It is mostly seen that gram-positive bacteria produce endospores, an intracellular spore, for their survival. Endospores are thick-walled structures that are formed inside the bacterial cells.
Spores are highly resistant and formed in response to bad environmental conditions.